7 segment 3 digit Temp Display? Arduino mini

hi there,

i'm working on project display temperature of thermocouple (i ordered amplifier already) on 3 digit 7 segment display, i've never done , cant make sense of there on internet.

ideally use arduino mini or nano (i have mini). also, have segment this  

here picture of intend do:



i want set temperature , once thermocouple reaches temperature servo moves.

i've done arduino projects before i'm me not ee please bear simple questions.

thanks in advance guidance

rather use display linked to, think far more cost effective use ready built lcd shield.  using shield precludes using arduino mini or nano.

i think need cost benefit analysis work out whether better use components have, plus whole week of work integrate system, or items more plug , play, , have working solution in hour or two.

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